Sequel to the events narrated in Sonic 2, the movie, based on the successful video game. The film follows, once again, the adventures of the famous Sega hedgehog together with the humans Tom and Maddie, and their new friend and companion Tails. Once again, the terrible Robotnik (Jim Carrey) has sinister plans to endanger all of humanity and the hero in blue has to get down to work to save the Earth and his friends.